Best Free Knowledge Base Software for Support Teams

ProProfs Knowledge Base

ProProfs has a free-forever tier with one author and up to 25 pages. It includes unlimited public views, a help widget, and revision history, so it is the clearest fit in this comparison when you need a small, public set of customer answers without a page-view bill. The limit that matters is content capacity: one author and 25 pages can be enough for a compact FAQ, but it is a real ceiling if several people need to maintain articles or the library expands.

A custom domain and removal of ProProfs branding are not included in that free tier. The reported add-on costs $300 per year. That changes the calculation for a company that considers its own domain and unbranded presentation necessary: the software may have a free entry plan, but a branded public help center does not stay free under those requirements. The reported figure does not establish other possible charges, so do not assume it covers every need.

Help Scout

Help Scout’s reported free plan combines a shared inbox, a hosted help center, and a Beacon widget. The stated limits are up to five users, 100 contacts per month, one Docs site, and 10 articles. That is useful context for a small support team deciding whether documentation should sit alongside customer conversations. The article limit is especially relevant: a small catalog may fit, while a growing set of shipping, returns, product, and account answers may run out of room.

Before choosing it, check the upgrade price, storage, branding terms, and plan details against your planned team size and content needs.

Notion

Notion’s free plan is suited to individuals and small teams using it as a workspace or internal wiki. It allows up to 10 guests and can publish basic Notion Sites. The free plan is not presented as a full customer-facing help center with every publishing control a support team might want. For a small internal handbook, the ability to document and collaborate may matter more than public help-center features.

Plus starts at $10 per member per month billed annually. A custom domain and removal of Notion branding are offered through a Sites add-on, reported at $8 per month per domain billed annually or $10 month-to-month. For a Notion knowledge base, check the free plan’s article and storage caps, team-member total, and publishing-branding details against your needs.

Confluence

Confluence is an internal knowledge-sharing workspace. Its free plan supports up to 10 users, making it a possible starting point for a small team writing procedures, project notes, and policies. Standard pricing is reported at roughly $5.42 per user per month on annual billing for the small-team tier. That is a per-user price, so the total rises with the number of paid users; the quoted rate is not a flat team fee.

Zendesk and paid-only tools

Zendesk offers a reported 14-day free trial, not a verified lasting free plan. Suite Team is reported at $55 per agent per month on annual billing. AI resolution charges may apply after the included allowance, and Copilot is a separate $50-per-agent-per-month add-on. Helpjuice and KnowledgeOwl are reported as paid-only entry points, while Document360 and Bloomfire require a sales conversation for a quoted price. A trial helps assess a product; it is not a permanent free plan.

The price detail to remember: seats are not the whole bill

For a small support team, the visible plan price is only one part of the choice. First decide whether the knowledge base is for customers or colleagues. A free internal wiki can be a sensible fit when staff need shared procedures. A public help center has additional questions: can customers find and search the articles, can you use a domain you control, can you remove the vendor’s branding, and can you see where readers fail to find an answer? Those requirements can move a tool from free to paid even if the basic writing space costs nothing.

The extra costs that are actually reported here are specific. ProProfs charges $300 per year for its custom-domain and branding-removal add-on. Notion’s Sites add-on is reported at $8 per month per domain on annual billing or $10 month-to-month. GitBook Essential is $65 per site per month billed annually, plus $12 per user per month, and custom domains start at Essential. These charges are separate from the free plan or depend on a paid plan, so include them when they match your needs.

Zendesk is another case where the seat price is not the whole cost. Suite Team is reported at $55 per agent per month on annual billing. The reported AI resolution allowance is expressed as a dollar amount per agent seat, and additional resolutions can be billed at $1.50 on committed volume or $2.00 pay-as-you-go. Copilot is reported as a separate $50 per agent per month. Those are distinct charges; the AI resolution bill depends on usage and the applicable allowance. A 14-day trial is a way to assess a product, not a free plan to budget around.

Worked team totals from verified per-seat prices

These examples use only reported per-seat prices and multiply by the stated team size. They are arithmetic illustrations, not complete quotes, and exclude add-ons, taxes, and usage charges.

At Notion Plus, $10 per member per month billed annually means a solo member is $10 per month or $120 for a year. A five-person team is $50 per month or $600 for a year. A ten-person team is $100 per month or $1,200 for a year. A custom domain would be an additional Sites add-on, reported at $8 per month per domain on annual billing.

At Zendesk Suite Team, $55 per agent per month on annual billing means a solo agent is $55 per month or $660 for a year. Five agents are $275 per month or $3,300 for a year. Ten agents are $550 per month or $6,600 for a year. These totals do not include possible resolution charges or the separate Copilot add-on. Help Scout’s per-seat paid price is not established, so a comparable paid total cannot be calculated from the verified details.

When paying is worth it

An upgrade can make sense when your free option runs out of authors or articles, when you need your own domain or want vendor branding removed, or when you need a paid team plan with a larger documented allowance. For an internal wiki, adding authors may be the main pressure. For a public support library, publishing controls and content limits may matter first. For a helpdesk with AI, compare the included conversation allowance and any usage-based extras rather than looking only at a starting seat price.

momo’s plans use flat EUR fees with included monthly AI conversations on paid plans, rather than per-resolution charges or credit packs. The Free plan has a one-time allowance, so it is a way to try the workflow with real visitors, not ongoing monthly capacity.